Hey everyone,
New to the forums here and wanted to make a post as this is exactly what happened a few days ago to my 17 R3.
It all started with a "Battery not recognized and will not charge" notification at the splash screen. I remember thinking that it was quite strange (I've owned the laptop for a few months) and it simply died about 20 minutes later while browsing the net to look to see if others were having the same issues.
As Joshua pointed out, the alien head was cycling colors but would not turn on. The fans would kick on for a split second and appear to short out.
Anyhow, I ended up calling Dell tech support and tried numerous fix attempts such as the CLRP1 pins reset but no luck. Ended up shipping the laptop in on Wed.
I'll post an update on the progress if I find out anything and hope this is not going to be a widespread issue.
Thanks all and good luck.